Call Parameters
| Enhanced Interface | |
| Function Number | Must be 81 |
| Data String | 1-character short name of the host presentation space or a blank or null indicating request for updates to the host-connected presentation space |
| Length | 4 is implied |
| PS Position | NA |
The calling data structure contains these elements:
| Byte | Definition |
| 1 | A 1-character presentation space short name (PSID) |
| 2-4 | Reserved |